mesh: Add Config Client API

The api is used to reset a node (other than a Provisioner) and
remove it from the network

this is port of c9be68532c0d19a721b95dfdc2170c321c3f1cc6

nimble/host/mesh/include/mesh/cfg_cli.h

@@ -37,6 +37,8 @@ extern const struct bt_mesh_model_cb bt_mesh_cfg_cli_cb;
 	BT_MESH_MODEL_CB(BT_MESH_MODEL_ID_CFG_CLI, bt_mesh_cfg_cli_op, NULL,   \
 			 cli_data, &bt_mesh_cfg_cli_cb)
 
+int bt_mesh_cfg_node_reset(uint16_t net_idx, uint16_t addr, bool *status);
+
 int bt_mesh_cfg_comp_data_get(uint16_t net_idx, uint16_t addr, uint8_t page,
 			      uint8_t *status, struct os_mbuf *comp);
 

nimble/host/mesh/src/cfg_cli.c

@@ -210,6 +210,26 @@ static void net_key_list(struct bt_mesh_model *model,
 	k_sem_give(&cli->op_sync);
 }
 
+static void node_reset_status(struct bt_mesh_model *model,
+		struct bt_mesh_msg_ctx *ctx, struct os_mbuf *buf)
+{
+	bool *param = NULL;
+	BT_DBG("net_idx 0x%04x app_idx 0x%04x src 0x%04x",
+		ctx->net_idx, ctx->app_idx, ctx->addr);
+
+	if (cli->op_pending != OP_NODE_RESET_STATUS) {
+		BT_WARN("Unexpected Node Reset Status message");
+		return;
+	}
+
+	param = cli->op_param;
+
+	if (param) {
+		*param = true;
+	}
+	k_sem_give(&cli->op_sync);
+}
+
 struct app_key_param {
 	uint8_t *status;
 	uint16_t net_idx;
@@ -686,6 +706,7 @@ const struct bt_mesh_model_op bt_mesh_cfg_cli_op[] = {
 	{ OP_MOD_SUB_LIST_VND,       7,   mod_sub_list_vnd},
 	{ OP_HEARTBEAT_SUB_STATUS,   9,   hb_sub_status },
 	{ OP_HEARTBEAT_PUB_STATUS,   10,  hb_pub_status },
+	{ OP_NODE_RESET_STATUS,      0,   node_reset_status},
 	BT_MESH_MODEL_OP_END,
 };
 
@@ -1157,6 +1178,44 @@ done:
 	return err;
 }
 
+int bt_mesh_cfg_node_reset(uint16_t net_idx, uint16_t addr, bool *status)
+{
+	struct os_mbuf *msg = BT_MESH_MODEL_BUF(OP_NODE_RESET, 0);
+	struct bt_mesh_msg_ctx ctx = {
+		.net_idx = net_idx,
+		.app_idx = BT_MESH_KEY_DEV_REMOTE,
+		.addr = addr,
+		.send_ttl = BT_MESH_TTL_DEFAULT,
+	};
+
+	int err;
+
+	if (status) {
+		*status = false;
+	}
+
+	err = cli_prepare(status, OP_NODE_RESET_STATUS);
+	if (err) {
+		return err;
+	}
+
+	bt_mesh_model_msg_init(msg, OP_NODE_RESET);
+
+	err = bt_mesh_model_send(cli->model, &ctx, msg, NULL, NULL);
+	if (err) {
+		BT_ERR("model_send() failed (err %d)", err);
+		cli_reset();
+		return err;
+	}
+
+	if (!status) {
+		cli_reset();
+		return 0;
+	}
+
+	return cli_wait();
+}
+
 int bt_mesh_cfg_app_key_get(uint16_t net_idx, uint16_t addr, uint16_t key_net_idx,
 			     uint8_t *status, uint16_t *keys, size_t *key_cnt)
 {

nimble/host/mesh/src/shell.c

@@ -609,11 +609,37 @@ struct shell_cmd_help cmd_uuid_help = {
 
 static int cmd_reset(int argc, char *argv[])
 {
-	bt_mesh_reset();
-	printk("Local node reset complete\n");
+	uint16_t addr;
+	if (argc < 2) {
+		return -EINVAL;
+	}
+
+	addr = strtoul(argv[1], NULL, 0);
+
+	if (addr == net.local) {
+		bt_mesh_reset();
+		printk("Local node reset complete");
+	} else {
+		int err;
+		bool reset = false;
+
+		err = bt_mesh_cfg_node_reset(net.net_idx, net.dst, &reset);
+		if (err) {
+			printk("Unable to send "
+					"Remote Node Reset (err %d)", err);
+			return 0;
+		}
+
+		printk("Remote node reset complete");
+	}
+
 	return 0;
 }
 
+struct shell_cmd_help cmd_reset_help = {
+	NULL, "<addr>", NULL
+};
+
 static uint8_t str2u8(const char *str)
 {
 	if (isdigit(str[0])) {
@@ -3259,7 +3285,7 @@ static const struct shell_cmd mesh_commands[] = {
     {
         .sc_cmd = "reset",
         .sc_cmd_func = cmd_reset,
-        .help = NULL,
+        .help = &cmd_reset_help,
     },
     {
         .sc_cmd = "uuid",